The first book about the changing of position from the neck to the
thumb positions (fingerings alla Petracchi)
THE DOUBLE BASS BLOG by Vito Liuzzi
"We all must thank you, Dear Vito, for your tireless work for all of us bassists!" You are doing so much for your
colleagues and your art.
PIERMARIO MURELLI - "Nuova didattica per contrabbasso " Ed.